Gas-burner.



L. D. LOVEKIN.

GAS BURNER.

APPLICATION FILED IULY ll, I9l4. I 1,134,62. Pat n d Apr. 6, 1915.

.,2' I .1 4 17 9 g I f 2 I ATTORN EY LUTHER D. LOVEKIN, OF PHILADEI PHIA, IPENNSYLVANIA.

ens-Bremen.

Specification of man mm.

Patented Apr. 6, 1915.

App i tion-med July 11, 1914i Serial No. 850,398.

To all whom it may concern:

Be it known that I, Lo'rmm D. Lovnmn, a citizen of the United States of America, residing in the city and county of Philadelphia, in the State of Pennsylvania, have invented certain new and. useful Improvements in Gas-Burners, of which the following is a true and exact description, reference being bad to the accompanying drawing? which form a part. thereof.

y present invention consists in an improved form of gas burner of the'Bunsen The object of my invention is to provide, a simple and efl'ective burner of the type specified, especially adapted for domestic use, as in a water heater, in which gas istaken from lighting mains at the usual pressure and air at atmospheric A essure is mixed therewith to support co ustion.

More specifically, the object 0t my invention is to provide a simple. and eflicient burner of the type and for the purposespecified, which is adapted to eflect a thorough mixture of air and gas in proper proportions with var ing rates of gas consumption, and will be so from back firing trouble under the varying conditions of use.

The various features of novelty which characterize my invention are pointed out with particularity in the claims annexed to and forming a part of this specification.

For a better understanding of the invention,

however, and of the advantages-possessed by it,- reference should be had to the accom represents the body portion of the burner casing or body. As shown, this'casing is of hour glass form, and the chamber therein is formed of two portions a and a, Which d1- minish in cross section from the ends of the casing to the orilice or short throat a= at which the two chamber portions (1 and a meet. As shown. the lower end of the easing is partially closed by the end wall A. formed with the air inlet ports A, and with. a central: passage-throughiwhich the gassupply pipe C Projects into the chamber a.

As shown, an. aperturedi damper B- is provided, bywhich the effective area of the air ports-A may be adjusted. It is to be observed that the gas supply pipe G, which is axially disposed with respect to the chembered casing" and. is directed toward the short throat or orifice a? through which the chamber portions a and w communicate, terminates at an appreciabledistance short of said throat or orifice. At its opposite end the casing A; is thickened to provide an annular seat A for the periphery of the circular screen: D made of fine wire mesh. The latter is-als'o supportedat its center by the central boss or member Afl'wlrich, as shown, is integrally connected to the casing body A by diametrically opposed fins or webs A. The edge ofthescreen D is'held against the seat A by the beveled ring E, and the ring E in turn is held in place in the construction shown by the cap member F, which closes the upper end oi the chamber a. The member: F is: provided with a) central portion fitmn'gagminst the upper side: of the member A, to which it is secured by means of a screw 6- capped into. the member A. The portion of the cap F surrounding this centrab portion is slightly flared outwardly, and advantageously is provided omits under side with ribs F, the lower edges of which. engage: and support the screen D. These ribs, as shown, are notched at F" to fitover the ring ,E'. The ribs- F I serve tow divide the mixture of air andgas issuing from the casing at the periphery f the cap F into jets which burn as-they issue from the burner casing,

With the-construction described, the -gas jet issuing through the nozzle C of the supply pipe- C exerts a substantial aspirating eflect on the air, which is thereby sucked into the chamber a/ through the ports A. As the. air and gas pass through the short throat or orifice a? connecting the chambers a and a they mix to a considerable extent. Thefact: that the'gas jet is discharged from the supply pipe tip C" at an appreciable distance to the supply side of the orifice,

while it diminishes to some extent the aspirating died; of the gas jet, adds materially to-the mixing efl'ect occurring as the air and gas pass from the chamber a into is rangement, of the barrier or bafiie' formednecessary for the most efficient use of the gas burned. This preliminary mixing is supplemented in the burner constructionshown by the minin occurring in the chamber a,

which depen s for its .efi'ectiveness largely upon the shape of the chamber and the,,.ar-

by-the central boss A The latter is so disposed that thej j more rapidly moving central portion of the discharge through the orifice a, and which :is also the portion richest in 1 gas, impinges directly against this barrier,

and is deflected outwardly and caused to thoroughly commingle'with'the more slowly moving and poorer gas mixture in the outer portion of the chamber a. y

I The outward inclinaticn'or flare given the under side of the outer portion of the member F causes the gas issuing at theperiphery of the cap member F to have a desirable inclination or direction of discharge. Moreover, this avoids gas pockets within the casing of the burner in which more or less stagnant bodies oflair or gas may collect,

' and thereby tend to the production of back firing, especially when the consumption of gas is comparatively small. With the construction described, the air and gas mixture is caused to flow through the burner casing with such velocity, under the varying conditions of use, that thereis very little tendency to back firing, even when the gas consumed .is relatively very small, and even though the screen D be omitted; and, with this screen in place, back firing does not occur at all with a properly designed burner operating under the usual conditions.

While I have shown an adjustable damper B, to regulate the efiective area of the air inlet ports A, I have found that, with the shape of the chambers a and a illustrated, the damper B is really unnecessary, if the ports A be large in aggregate cross sectional area as compared with the cross sectional area of the orifice a Having now described my invention, what I claim as new and desire to secure by Let,

ters Patent, is: v

1. In a gas burner, a casing formed with a chamber consisting of two portionsextending from a central orifice at which they meet to the opposite ends of the chamber and each increasing in cross section from said orifice to the end of the chamber to which it extends, said casing being provided at one end with air inlets and with a ing body, and a. cap also extendin mamas central gas inlet opening with-in said casing ad acent said end toward but at an appreciahledistance from, sai orifice, and said air inlets being large in transverse'area as compared with said orifice, said casing havmg an end wall at its opposite end closing the'latter except for burner outlets at its pebaille portion projecting-into said chamber and-a surrounding portion slightly flared outwardly.

2. In a gas a. chamber consisting of .two portions ex tending from a central orifice at which they meet to the opposite ends of. the chamber and each increasing in crossi'section from said orifice to the'end ofjthe' 'ai'nber to which it extends, said casing beij ovided at one end with air inlets and with abentral gas inlet openin withinsa-id casing toward said orifice, said air inlets bein'g'large in transverse area ascompared with said orifice, said casing being formed at-its opposite end with a central boss forming a barrier or baiile in front of said orifice and a removable cap covering said boss and extending from the latter to the. periphery of burner, a casing formed with riphery and formed with a central barrier or, A

the casing'and being spaced away from the latter to provide burner outlets.

3. A gas burner comprising a casing body of; hour glass form havin air and gas inlets at one end and a central oss at its opposite end and a cap extending from said boss to the peripheral edge of said casing, said cap being outwardly flared and separated'at its periphery from the adjacent peripheral edge of the casing body.

l. A gas burner comprising a casing body of hour glass form havin air and gas inlets at one end and a central oss at its opposite end and an apertured screen extendin from. said boss to the peripheral edge of t e casfrom said boss to the edge of the casing b0 y, said cap bein'g outwardly flared and spaced away from said screen and the peripheral edge of said casing body.

A gas burner com rising a casing body of hour glass form havm airand' gas inlets at one end and a central oss at its opposite end, an apertured screen extending across said opposite end'ot the casing body and engaging said boss and thevperipheral edge of the casing body, a clampingrlng holding the edge of said screen against the edge of the casing body, and :1 ca member clamping said screen against sai boss and extending to the peripheral edge of said casing body, said cap member being outwardly flared and spaced away [from said screen and ring to form an annular chamber on the outlet side of said screen which increases in thickness from said boss to the peripheral edge of the casing body and is partially restricted at its outer edge by said ring.

i at one end and a central 6. A gas burner comprising a casing body of hour glass form havin air and gas inlets end, an apertured screen extending across said opposite end of the casing bod and engaging said boss and the periphera edge of the casing body, a clamping ring for holding the edge of said screen against the edge of the casing body, and a cap member clamping saidscreen against said boss and extending to the peripheral edge of said casing body, said cap member comprising oss at its opposite an outwardly flared bod portion spaced away from said screenan ring to form an annular chamber on the outlet side of said 15 screen, increasing in thickness from said boss to the peripheral edge of the casing body, and having ribs at its inner side shaped to bear against said screen and ring. 

